How to combine two graphs in one?

i have two graphs each of them based on it’s own date interval
is there an ability to combine them in one graph???

Do you have an example of how this should look? It sounds like you should consolidate into a single query that returns three columns: date, line1, and line2. Am I missing something?

for example i have a query that retrieve data for August and making chart for that query
and i make another query that retrieve data for September & October also i made chart for it .
i need to get two chart in one
what i have done that write two query and make left join between them but when i chart them only data of October & Augst appear September not